JP2000005984A - Chip fixing jig - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chip fixing jig capable of surely fixing to a tool grinding machine a plate-shaped chip having a longitudinal groove part formed in its back and of being manufactured at low cost because of simple constitution. SOLUTION: In a chip fixing jig which comprises a jig main body 22 mounted on the table 18 of a tool grinding machine and a holding member 24 fixed to the jig main body, and which is designed so that when a plate-shaped chip 10 requiring edge grinding is placed with its front abutting against the jig main body, the holding member clamps the chip between it and the jig main body via a longitudinal groove part 12 in the back of the chip, the holding member forms a longitudinal groove 28 in its surface directed to the jig main body, and in a portion corresponding to the grooved part of the chip, and a round bar 30 of the required diameter is interposed between the longitudinal groove 28 formed in the holding member and the longitudinal grooved part of the chip. Under these conditions, the holding member is fixed to the jig main body whereby the chip can be clamped in place between both of these members via the round bar.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jig for fixing chips, and more particularly, to a jig for fixing a plate-like chip having a longitudinal groove formed on a back surface thereof to a tool grinder. However, the present invention relates to a simple and inexpensive chip fixing jig.

[0002]

2. Description of the Related Art For example, a plane chip in a plane machine or a molder is provided with a plate-like tip at a required interval in a radial direction thereof. This tip is generally of a replaceable type, and if a worn tip or chipping occurs, the tip can be replaced with a new tip. Therefore, this kind of chip is originally disposable, but recently, in order to make effective use of resources, there is a tendency in industrial industry to remove worn chips from holders such as plane cylinders and polish them before reuse. Has become widely established. By the way, in this specification, a chip refers to a small piece of blade material used by being attached to a body or a shank and having a blade portion formed in a part thereof.

As described above, the chip can be easily attached to and detached from the holder, and various attachment and detachment mechanisms have been proposed by various companies. As an example, FIGS. 7 and 8 show a plate-like chip 10 of a required length exclusively used for a holder (not shown) having a specific chip attaching / detaching mechanism. Is formed with a groove 12 extending in the longitudinal direction. This groove 1
As shown in FIG. 7 in which the chip 10 is observed from the front side and FIG. 8 in which the chip 10 is observed from the back side, the channel 2 is a channel-shaped groove which is wide and expands outward.

The present invention relates to a jig for fixing the chip 10 to a table of a grinding machine when polishing the plate-shaped chip 10 provided with the longitudinal grooves 12 on the back surface as described above. First, the implemented chip fixing jig will be described. FIG. 6 shows a jig 14 for fixing a chip according to the prior art. The chip 10 is fixed to a table 18 of a tool grinder 16 via the jig 14. That is, the tool grinder 16 includes a table 18 that reciprocates horizontally and a rotating grindstone 20 that is disposed to face the table 18 and grinds the cutting edge of the chip 10 fixed to the fixing jig 14. ing. The fixing jig 14 includes a jig main body 22 which is attached to a fixed position of the table 18 while maintaining a required inclination angle, and a pressing member 24 which can hold the chip 10 between the jig main body 22 and the jig main body 22.
The pressing member 24 is fixed to the jig main body 22 by a required number of bolts 26 so that the force for fixing the chip 10 is adjustable. Since the chip 10 shown in the embodiment is configured as a long plate-like member, the jig body 22 and the pressing member 24 are also connected to the chip 1.
It is configured as a sufficiently long material that can cover the entire length of zero.

As shown in FIG. 6, the jig main body 22 has a step 22a on which the plate-like chip 10 is placed, and the surface of the chip 10 faces downward with respect to the step 22a. The placement is performed in such a state. The surface of the holding member 24 facing the jig main body 22 is provided with the stepped portion 2.
2a, a longitudinal ridge 24 protruding from the longitudinal groove 12 of the chip 10 placed downward.
a is formed. To fix the chip 10 to the fixing jig 14, the longitudinal ridge 24 a protruding from the holding member 24 is formed in the longitudinal groove 1 of the chip 10.
2, the plurality of bolts 26 are sequentially tightened. The surface of the holding member 24 facing the jig body 22 is provided with the ridges 24 in the longitudinal direction.
A longitudinal protrusion 24b is formed in parallel with a, and a jig body 22 is formed with a longitudinal groove 22b for receiving the longitudinal protrusion 24b correspondingly. When the holding member 24 is fixed to the jig main body 22, the longitudinal protrusion 24b is fitted into the longitudinal groove 22b to regulate the position.

[0006]

In the conventional fixing jig 14 described with reference to FIG. 6, it is indispensable to form a protruding ridge 24a in the pressing member 24 in the longitudinal direction. However, since the ridges 24a are fitted and fixed in the grooves 12 formed on the back surface of the chip 10, the cross-sectional shape of the ridges 24a is highly accurate to the cross-sectional shape of the groove 12. Need to match. This ridge 2
4a is formed on the holding member 24 by grinding, but the longitudinal groove 12 is generally required to have a high linear accuracy because of its small size, and therefore requires a high level of grinding technology and skill. There are drawbacks. Also, the use of the fixing jig 14 causes the protruding ridges 24a of the holding member 24 to be worn, so that it is inevitable that the fixing accuracy of the chip 10 is reduced. For this reason, re-polishing for regenerating the ridge portion 24a is required, but this requires an extremely troublesome work for the operator. In order to improve the abrasion resistance of the ridges 24a, it is proposed to apply a heat hardening treatment to the easily worn portions of the ridges 24a. Was not enough.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned drawbacks inherent in a chip fixing jig according to the prior art. It is an object of the present invention to provide a chip fixing jig which can securely fix a chip to a tool grinder, has a simple structure, and can be manufactured at low cost.

[0008]

SUMMARY OF THE INVENTION In order to overcome the above problems and effectively achieve the intended object, the present invention provides a jig body attached to a fixed position of a table in a tool grinder, and a jig body. When a plate-like chip (10) to be polished with a cutting edge is placed such that the surface side thereof comes into contact with the jig body, the holding member is fixed. A member is a chip fixing jig configured to pinch and fix the chip with the jig main body through a longitudinal groove formed on the back surface of the chip, wherein the pressing member faces the jig main body. And a longitudinal groove is formed at a position corresponding to the groove (12) of the chip, and a required diameter is formed between the longitudinal groove formed on the pressing member and the longitudinal groove of the chip. Of the jig body in this state. By performing the fixing of the holding member, characterized by being configured to be sandwiched pressure fixed through the rod to the tip between the two members.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A jig for fixing a chip according to the present invention will now be described with reference to the accompanying drawings with reference to preferred embodiments. Note that the basic structure of the fixing jig and the configuration of the tool grinder are the same as those described in the section of the prior art, and therefore the same members are denoted by the same reference numerals. Further, as described above, the chip 10 fixed by the fixing jig 14 according to the present embodiment is grasped as a plate-shaped member having the longitudinal groove 12 formed on the back surface thereof.

FIGS. 1 and 2 show a fixing jig according to a preferred embodiment of the present invention. When the holding member 24 is attached to the jig body 22, the holding member 24 A groove 28 extending in the longitudinal direction is formed on a surface facing the surface 22 and at a position corresponding to the longitudinal groove 12 formed on the back surface of the chip 10. As shown in FIGS. 1 to 5, the longitudinal grooves 28 in the holding member 24
The cross section is formed so as to be V-shaped, and a round bar 30 described later can partially face the V-shaped groove 28.

On the side of the holding member 24 facing the jig main body 22 and adjacent to the V-shaped groove 28 extending in the longitudinal direction, the holding member 24 is elongated in parallel with the V-shaped groove 28. A second groove 32 extending in the direction is formed. Further, a third longitudinal groove 36 is formed in the jig body 22 at a position corresponding to the second groove 32 when the holding member 24 is arranged at a fixed position. These second and third longitudinal grooves 32, 36 have a cross section V as shown in FIGS.
It is formed in a shape so that another round bar 34 to be described later can partially face both V-shaped grooves 32 and 36.

As the round bar 30, a generally available steel round bar is used. As will be described later, even though the tip 10 is sandwiched between the pressing member 24 and a tool grinder, the hardness of the bar 10 can be reduced. It is desirable to have. In addition, the diameter of the round bar 30 is equal to the diameter of the V provided on the pressing member 24 as shown in FIG.
Only a part of the round bar 30 faces the groove 28, and the V-shaped groove 2
The portion protruding from 8 is set to a dimension that can be brought into contact with the groove 12 of the chip 10. That is, when the lower portion of the round bar 30 faces the groove 12 of the chip 10 as described later, the diameter of the round bar 30
Is set to a dimension that allows contact along two outer edges facing each other. Further, as the round bar 34 different from the round bar 30, a commonly available steel round bar is preferably used, and the round bar 34 is, as shown in FIG. The pressing member 24 is set in such a size that it can be interposed between the shape groove 32 and the third V-shaped groove 36 in the jig body 22 so as to regulate the position of the jig body 22 accurately. I have.

(Actual Use of the Fixing Jig According to the Embodiment) Next, the actual use of the chip fixing jig according to the preferred embodiment configured as described above will be described. Jig body 2
2 is the jig body 22 as described in the section of the prior art.
Is mounted on a table 18 of the tool grinder 16. As shown in FIG. 2, the chip 10 that requires polishing of the cutting edge is placed on the step 22a formed on the jig body 22 so that the front side of the chip faces downward. The groove 12 formed at the top is upward. Next, the third V formed on the jig body 22 is formed.
The round bar 36 faces the shaped groove 36, and the second V-shaped groove 32 of the holding member 24 faces the round bar 36, thereby temporarily positioning the holding member 24 with respect to the jig main body 22. .

The round bar 30 is interposed between the groove 12 (upward) of the chip 10 placed on the step 22 a of the jig main body 22 and the V-shaped groove 28 of the holding member 24. As a result, the lower part of the round bar 30 is located in the groove 12 of the tip 10 and the upper part is the pressing member 24.
In the V-shaped groove 28 of FIG. In this state, presser member 2
By sequentially tightening the bolts 26 provided at required intervals in the longitudinal direction of 4, the holding member 24 is securely fixed to the jig main body 22. At this time, since the round bar 30 facing the upper part of the V-shaped groove 28 of the holding member 24 has the lower part facing the groove 12 of the tip 10, the round bar 30 is used for tightening the bolt 26. Accordingly, the chip 10 is strongly pressed against the step 22a of the jig main body 22. And round bar 3
Since the lower portion of 0 is in contact with the two opposing outer edges of the groove 12 of the chip 10 as described above, precise position regulation at the step 22a is achieved.
After the chip 10 is securely fixed to the fixing jig 14 as described above, the rotating grindstone 20 of the tool grinder 16 is rotated, and the rotating grindstone 20 and the table 18 are relatively horizontally reciprocated. Then, the surviving surface of the chip 10 is polished. In the embodiment, the polishing is performed by the flat grindstone, but the polishing by the side surface of the cup grindstone may be performed instead of the flat grindstone.

After the polishing of the chip 10 is completed, the plurality of bolts 26 are sequentially loosened to thereby reduce the round bar 3.
0, the fixing of the chip 10 to the fixing jig 14 is released. Accordingly, the cycle of removing the polished chip 10 from the fixing jig 14, setting the chip 10 requiring the next polishing on the fixing jig 14 again, and operating the tool grinder 16 is repeated. As described above, a commercially available steel round bar can be used as the round bar 30.
When 0 wears out due to long-term use, it may be replaced with a new round bar, and no troublesome work such as regrinding is required. In order to improve workability, the pressing member 2
The round bar 30 may be magnetically attracted by embedding a permanent magnet in the tube 4, or the round bar 30 may be suspended by being attached to an elastic member such as rubber. Bolt 2
An elastic restoring member such as a spring may be interposed between the holding member 24 and the jig body 22 so that the holding member 24 is immediately lifted when the member 6 is loosened.

(Modification of Embodiment) The chip 10
Is fixed to the fixing jig 14 as described above.
0 is required to be interposed between the holding member 24 and the chip 10. On the other hand, the structure for temporarily positioning the holding member 24 with respect to the jig body 22 is the same as that of the above-described another round bar 36. It is not limited to use. For example, FIG.
FIG. 14 is a schematic side view showing a modified example of the fixing jig 36, wherein a protrusion 38 that protrudes in parallel with the longitudinal groove 28 is formed in a longitudinal direction on a surface of the holding member 24 facing the jig body 22. I have. The jig body 22 has a holding member 24 attached thereto.
Is set, a longitudinal groove 40 is formed in a portion corresponding to the protrusion 38 of the pressing member 24, and the protrusion 38
Can be accepted. Therefore, when the holding member 24 is fixed to the jig main body 22, if the longitudinal protrusion 38 is fitted into the longitudinal groove 40, the position of the members 22, 24 can be regulated very easily. Done.
In this case, it is preferable that the projecting portion 38 is formed so that its longitudinal section becomes a semicircle, and the concave groove 40 is formed so that its longitudinal section becomes V-shaped.

FIG. 4 shows another modification of the above embodiment, in which a longitudinal projection 38 provided on the holding member 24 is formed to have a semicircular longitudinal section. The corresponding concave groove 40 of the jig main body 22 is formed so that its vertical section becomes V-shaped. FIG. 5 shows still another modification of the above embodiment. The protrusion 38 provided on the holding member 24 is formed to have a semicircular vertical section as in the example of FIG. I have. However, the corresponding concave groove 40 of the jig main body 22 has a channel-like shape in which two opposing outer edges are curved, and the semicircular protrusion 38 can be sandwiched between both outer edges. It has a groove shape. In any of the modified examples, if the protrusion 38 faces the concave groove 40 of the jig main body 22, the protrusion 38 is guided by the slope or the curved portion, and the protrusion 38 is smoothly settled in the concave groove 40. Reach.

[0018]

As described above, according to the chip fixing jig according to the present invention, when a plate-like chip having a longitudinal groove formed on the back surface is fixed to the tool grinder by the fixing jig, Reliable fixing of the chip can be achieved with a simple configuration in which a round bar is interposed between the groove of the chip and the groove of the pressing member. According to the configuration of the fixing jig, even if the round bar is worn due to long-term use and the fixing accuracy of the chip is reduced, it can be dealt with only by replacing the round bar with a new round bar. There is no need to precisely re-polish the ridge of the member. Further, since a commercially available inexpensive steel round bar can be selected and used, there is an advantage that the manufacturing cost of the fixing jig can be suppressed at a low cost as a whole.

[Brief description of the drawings]

FIG. 1 is a side view showing a state in which a jig for fixing a tip according to a preferred embodiment of the present invention is attached to a table of a tool grinder.

FIG. 2 is a schematic perspective view showing the chip fixing jig shown in FIG. 1 in an exploded state.

FIG. 3 is a schematic side view showing a modification of the fixing jig according to the preferred embodiment shown in FIG. 1;

FIG. 4 is a schematic side view showing another modification of the fixing jig according to the preferred embodiment shown in FIG. 1;

FIG. 5 is a schematic side view showing still another modification of the fixing jig according to the preferred embodiment shown in FIG. 1;

FIG. 6 is a side view showing a state where a tip fixing jig according to the related art is mounted on a table of a tool grinder.

FIG. 7 is a perspective view of a plate-like chip having a longitudinal groove formed on the back surface, as observed from the front side.

FIG. 8 is a perspective view of a plate-like chip having a longitudinal groove formed on the back surface, observed from the back surface side.

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 chip 12 long groove 18 table 22 jig main body 24 holding member 28 groove 30 round bar 32 second groove 34 round bar 36 third groove 38 protrusion 40 concave groove

Claims (5)

[Claims] 1. A jig main body (22) attached to a fixed position of a table (18) in a tool grinder, and a pressing member (24) fixed to the jig main body (22) so as to be adjustable in fixing force. Consisting of
When a plate-like chip (10) to be polished to a cutting edge is placed so that its front surface side is in contact with the jig body (22), the pressing member (24) is attached to the back surface of the chip (10). The chip (10) is inserted into the jig body (22) through the formed longitudinal groove (12).
In the chip fixing jig configured to be clamped and fixed by the above, the pressing member (24) is a surface facing the jig body (22), and corresponds to the groove (12) of the chip (10). A longitudinal groove (28) is formed in a region to be formed, and a longitudinal groove (28) formed in the pressing member (24) and a longitudinal groove of the tip (10) are formed.
By inserting a round bar (30) having a required diameter between the tip (10) and the jig body (22) and fixing the holding member (24) to the jig body (22) in this state, the tip (10) is removed. A jig for fixing a chip, wherein the jig is fixed so as to be squeezed and fixed between the two members (22, 24) via the round bar (30). 2. The diameter of the round bar (30) is such that when the lower portion of the round bar (30) faces the longitudinal groove (12) of the tip (10), 2. The jig for fixing a chip according to claim 1, wherein the jig is set to a size that can be contacted along the outer edges facing each other. 3. A longitudinal groove in the holding member (24).
(28) wherein the cross section is V-shaped.
A jig for fixing a chip according to the item. 4. A second longitudinal groove (32) is formed on a surface of the holding member (24) facing the jig body (22) in parallel with the longitudinal groove (28). A third longitudinal groove (36) is formed in the jig body (22) in correspondence with the second longitudinal groove (32), and these second and third longitudinal grooves are formed. The fixing member (24) is fixed to the jig body (22) with another round bar (34) interposed between the grooves (32, 36). 4. The jig for fixing a chip according to any one of items 3 to 5. 5. A longitudinal projection (38) projecting in parallel with the longitudinal groove (28) is formed on a surface of the holding member (24) facing the jig body (22). And the jig body (22)
The jig body (22) is formed with a longitudinal concave groove (40) for receiving the longitudinal protrusion (38) in a corresponding manner, and when the holding member (24) is fixed to the jig body (22), the longitudinal direction groove is formed. Projection (38)
The jig for fixing a chip according to any one of claims 1 to 3, wherein a position of the jig is regulated by fitting into the concave groove (40) in the longitudinal direction.